Service manual
4645
PRINTED WIRING BOARD
1. Circuit Check Procedure
1) Low voltage transformer (DMR-9940F) check.
The low voltage transformer is located on the P.C.B. Measuring condition : Input voltage : 230V (240V)
Frequency : 50Hz
\
2) Voltage check
Key check point (MICOM PIN)
CHECK METHOD
NOTE 1: Secondary side voltage of the low voltage transformer changes in proportion to fluctuation of power
source voltage.
NOTE 2. : The acceptable tolerance of the secondary voltage is within ¡ 5% of norminal voltage
NOTE : Each measure point must be measured with GND points.
Voltage
LOAD NO LOAD
Terminal
C-D -19VDC -24VDC
E-F -34VDC -36VDC
G-H 2.6VAC 2.7VAC
A
C
D
E
F
G
H
B
NO. CHECK POINT REMARK
1 PIN 21,24,32,33 OR 34 - 5VDC
2 PIN 48 - 27VDC
3 PIN 44
4 PIN 18 OR 19
5 DP 1 PIN 1 & 25 2.6 VAC (DISPLAY FILAMENT VOLTAGE)
NO. MEASURE POINT Fig. 17 WAVEFORM REMARK
1 MP 1 -5V DC REPLACE Q8, EC2
2 MP 2 -16V DC REPLACE Q12, EC5
3 MP 3 -24V DC REPLACE D12,D13
T
T
0V
0V
5V
5V
T: 238 ms
T: 20 ms (50 Hz)
NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK
F39 7121400811 SCREW TAPPING T2S PAN 4X8 MFZN 1
F40 3518902800 THERMOSTAT 130/120 H PW-2N 1
F41 7121400811 SCREW TAPPING T2S PAN 4X8 MFZN 1
F42 3512505000 GUIDE WIND P.P 1
F43 3963512910 MOTOR SHADED POLE 230V 25W MW15CA-K01 1
3963512900 OEM-15DWC2-A02 SUB
F44 7124402511 SCREW TAPPING T2S RND 4X25 MFZN 2
F45 3511800100 FAN P.P+G/F 1
F46 4416W67820 CAPACITOR H.V 2100V AC 1.1µF 1
F47 3513001000 HOLDER CAPACITOR SECC 0.6T 1
F48 7S422X4081 SCREW SPECIAL TT2 TRS 4X8 SE MFZN 1
F49 4416V24000 DIODE HV HVR-1X-32B(D5.3) 1
F50 7S422X4081 SCREW SPECIAL TT2 TRS 4X8 SE MFZN 1
F51 3518700210 FUSE HV 5KV 0.7A THV-060T 1 OPTION
F52 3518602700 NOISE-FILTER DWLF-L1 1
F53 4414A25100 FUSE BUSSMANN MDA-15 1
F54 7621401211 SCREW TAPPING T2S PAN 4X12 PW MFZN 2
F55 35113A5L25 CORD POWER AS 3X1.5 80X80 120-RTML 1
35113E5L25 3X1.5 80X80 120-RTML U.K
F56 7S422X4081 SCREW SPECIAL TT2 TRS 4X8 SE MFZN 2
F57 7S422X4081 SCREW SPECIAL TT2 TRS 4X8 SE MFZN 1
F58 7650501611 BOLT HEX 6B-1 5X16 HS MFZN 2
F59 7S627W50X1 NUT HEX FLANGE M5X0.8P MFZN 2
F60 3511401400 COVER *B SBHG-1 0.6T 1
F61 7S312X4081 SCREW TAPPING T1 TRS 4X8 SE MFZN 1
F62 3510800800 CABINET PCM 0.6T 1
F63 7S312X4081 SCREW TAPPING T1 TRS 4X8 SE MFZN 4
F64 3517203201 TRAY RACK AS KOG-8415 104MM 1
F65 3517203500 TRAY GLASS 1
F66 3512512500 GUIDE ROLLER AS KOG-846T PPS 1
F67 7S341W40B1 SCREW SPECIAL T2S PAN 4X12 PW SE MFZN 1
F68 4419J75030 RESISTOR S/A 20W 20ohm 1
For Germany
F69 7S312X4081 SCREW TAPPING T1 TRS 4X8 SE MFZN 1
For Germany
A00 3511704420 DOOR AS KOG-843KS 1
SEE DETAIL P25
B00 PKCPSWPV00 CONTROL-PANEL AS KOG-846T ØS 1
SEE DETAIL P24
ƒƒNN
SUB : Substitutive
* : FOR GERMANY USE ONLY
T : 250 ms